Table 8.
Metabolic availability (MA, %) of Met in PD-BSFL meal based on the rate of L-[1-13C]-Phe oxidation and the 13C enrichment in expired air (APE, %) in response to graded intake of Met in reference diets (REF) and BSFL test diets (BSFL meal)
| Methionine source | n | Slope equation | Standard error | P-value | MA, % |
|---|---|---|---|---|---|
| L-[1-13C]-Phe oxidation1 | |||||
| REF diets | 7 | −0.0400x + 5.04 | 0.00871 | <0.0001 | 1002 |
| BSFL meal | 7 | −0.0210x + 4.36 | 0.00870 | 0.02 | 52.5 |
| 13C enrichment (APE, %)1 | |||||
| REF diets | 7 | −0.000150x + 0.0187 | 0.000033 | 0.0001 | 1002 |
| BSFL meal | 7 | −0.0000800x +0.0165 | 0.000033 | 0.0197 | 53.3 |
1IAAO response variable used to calculate MA of Met.
2Metabolic availability of Met from DL-Met in REF diets was assumed to be 100%.